RC paper is much easier to wash, five minutes under running water should be fine. To be on the safe side add a two minutes in hypo-clearing solution and should be super clean. I lay down the print emulsion up on a tray laid upside down at the bottom of the sink and let flow the water from the tap.
Fiber paper is a bit longer process but quite similar, for me. A brief rinse under the tap , five minutes in HCA, 15 minutes set up as for RC. I cannot assure beyond any doubt this is enough, let alone call it archival, but so far no problem. For sure shorter times aren't enough, as after a while brown stains start to appear...
Having said all that I agree a proper washer would be ideal, more time to print new pictures or taking new ones
, way less thinking back about archival matters. Money permitting...
Cheers, M.